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CN109844373B - Motor vehicle clutch assembly including a damper to smooth clutch engagement - Google Patents

Motor vehicle clutch assembly including a damper to smooth clutch engagement Download PDF

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Publication number
CN109844373B
CN109844373B CN201780064981.8A CN201780064981A CN109844373B CN 109844373 B CN109844373 B CN 109844373B CN 201780064981 A CN201780064981 A CN 201780064981A CN 109844373 B CN109844373 B CN 109844373B
Authority
CN
China
Prior art keywords
clutch
piston
damper
clutch plate
motor vehicle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201780064981.8A
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Chinese (zh)
Other versions
CN109844373A (en
Inventor
阮锡叶
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Publication of CN109844373A publication Critical patent/CN109844373A/en
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Publication of CN109844373B publication Critical patent/CN109844373B/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H45/00—Combinations of fluid gearings for conveying rotary motion with couplings or clutches
    • F16H45/02—Combinations of fluid gearings for conveying rotary motion with couplings or clutches with mechanical clutches for bridging a fluid gearing of the hydrokinetic type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D13/00—Friction clutches
    • F16D13/22—Friction clutches with axially-movable clutching members
    • F16D13/38—Friction clutches with axially-movable clutching members with flat clutching surfaces, e.g. discs
    • F16D13/52—Clutches with multiple lamellae ; Clutches in which three or more axially moveable members are fixed alternately to the shafts to be coupled and are pressed from one side towards an axially-located member
    • F16D13/54—Clutches with multiple lamellae ; Clutches in which three or more axially moveable members are fixed alternately to the shafts to be coupled and are pressed from one side towards an axially-located member with means for increasing the effective force between the actuating sleeve or equivalent member and the pressure member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D13/00—Friction clutches
    • F16D13/58—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D25/00—Fluid-actuated clutches
    • F16D25/06—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch
    • F16D25/062—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces
    • F16D25/063—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutch members exclusively moving axially
    • F16D25/0635—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutch members exclusively moving axially with flat friction surfaces, e.g. discs
    • F16D25/0638—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutch members exclusively moving axially with flat friction surfaces, e.g. discs with more than two discs, e.g. multiple lamellae
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D25/00—Fluid-actuated clutches
    • F16D25/12—Details not specific to one of the before-mentioned types
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2250/00—Manufacturing; Assembly
    • F16D2250/0023—Shaping by pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2300/00—Special features for couplings or clutches
    • F16D2300/22—Vibration damping
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H45/00—Combinations of fluid gearings for conveying rotary motion with couplings or clutches
    • F16H45/02—Combinations of fluid gearings for conveying rotary motion with couplings or clutches with mechanical clutches for bridging a fluid gearing of the hydrokinetic type
    • F16H2045/0221—Combinations of fluid gearings for conveying rotary motion with couplings or clutches with mechanical clutches for bridging a fluid gearing of the hydrokinetic type with damping means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H45/00—Combinations of fluid gearings for conveying rotary motion with couplings or clutches
    • F16H45/02—Combinations of fluid gearings for conveying rotary motion with couplings or clutches with mechanical clutches for bridging a fluid gearing of the hydrokinetic type
    • F16H2045/0273—Combinations of fluid gearings for conveying rotary motion with couplings or clutches with mechanical clutches for bridging a fluid gearing of the hydrokinetic type characterised by the type of the friction surface of the lock-up clutch
    • F16H2045/0284—Multiple disk type lock-up clutch

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Operated Clutches (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
  • Springs (AREA)
  • Vibration Dampers (AREA)

Abstract

A motor vehicle clutch assembly is provided. The motor vehicle clutch assembly includes: a clutch pack including a first clutch plate; an axially movable piston for engaging the clutch pack; and a damper fixed to the first clutch plate. The damper is configured to contact the piston and elastically deform to absorb torque shock from the piston during engagement of the clutch pack by the piston. A method of forming a motor vehicle clutch assembly is also provided. The method comprises the following steps: providing a clutch pack comprising a first clutch plate; providing an axially movable piston for engaging the clutch pack; and fixing the damper to the first clutch plate. The damper is configured to contact the piston and elastically deform during engagement of the clutch pack by the piston to absorb torque shock from the piston.

Description

Motor vehicle clutch assembly including damper for smoothing clutch engagement
Technical Field
The present disclosure relates generally to motor vehicle clutch assemblies and more particularly to a damper for smoothing clutch engagement.
Background
U.S. Pat. No. 9,080,616 B2 discloses a transmission piston with a retained return spring and a preload spring. WO 2016/130269 A1 discloses a first resilient element for at least one cover and drive flange and a second resilient element for forcing a turbine assembly away from the cover assembly. U.S. application No.15/140,757 discloses a spacer plate that captures a diaphragm spring for sliding engagement with a damper design. U.S. application No.15/004,110 discloses a biasing/diaphragm spring between a flange and a turbine.
Disclosure of Invention
A motor vehicle clutch assembly is provided. The motor vehicle clutch assembly includes: a clutch pack including a first clutch plate; an axially movable piston for engaging the clutch pack; and a damper fixed to the first clutch plate. The damper is configured to contact the piston and elastically deform during engagement of the clutch pack by the piston to absorb torque shock from the piston.
Embodiments of the motor vehicle clutch assembly may include one or more of the following features:
the damper is a damper spring including a base portion fixed to the first clutch plate and a contact portion for contacting an engine-side surface of the piston;
the damper spring further includes an axially and radially extending intermediate portion connecting the contact portion to the base portion, the intermediate portion being configured for bending away from the piston during engagement of the clutch pack by the piston;
a front cover to which the first clutch plate is elastically connected by at least one first elastic connection;
at least one first resilient connecting member is formed by a plurality of circumferentially spaced leaf springs;
each of the leaf springs is connected to the first clutch plate by a respective fastener, which secures the damper to the first clutch plate;
a hub portion and a radially extending support plate fixed to the hub portion, the hub portion being fixed to the front cover, the piston being axially slidable along the front cover and the support plate in a sealed manner;
the piston is elastically connected to the supporting plate through at least one second elastic connecting piece;
the first clutch plate includes a radially outer portion for engaging the other clutch plates of the clutch pack and a radially inner portion to which the damper is secured.
A torque converter including the clutch is also provided.
A method of forming a motor vehicle clutch assembly is also provided. The method comprises the following steps: providing a clutch pack comprising a first clutch plate; providing an axially movable piston for engaging the clutch pack; and fixing the damper to the first clutch plate. The damper is configured to contact the piston and elastically deform during engagement of the clutch pack by the piston to absorb torque shock from the piston.
Embodiments of the method may include one or more of the following features:
the damper is a damper spring including a base portion fixed to the first clutch plate and a contact portion for contacting an engine-side surface of the piston;
the damper spring further includes an axially and radially extending intermediate portion connecting the contact portion to the base portion, the intermediate portion being configured for bending away from the piston during engagement of the clutch pack by the piston;
elastically connecting the first clutch plate to the front cover by at least one first elastic connection;
at least one first resilient connecting member is formed by a plurality of circumferentially spaced leaf springs;
each of the leaf springs is connected to the first clutch plate by a respective fastener, which secures the damper to the first clutch plate;
securing the hub portion to the front cover and the radially extending support plate to the hub portion, the piston being axially slidable along the front cover and the support plate in a sealed manner;
elastically connecting the piston to the support plate by at least one second elastic connection;
the first clutch plate includes a radially outer portion for engaging the other clutch plates of the clutch pack and a radially inner portion to which the damper is secured.
Drawings
The invention is described by reference to the following drawings, in which:
FIG. 1 illustrates a cross-sectional side view of a torque converter according to an embodiment of the present invention;
FIG. 2a shows a damper spring of a torque converter according to a first embodiment; and
fig. 2b shows a damper spring of a torque converter according to a second embodiment.
Detailed Description
The present disclosure provides a leaf spring to connect a clutch pack including a plurality of clutch plates, rather than supporting the clutch plates by a carrier ring. Riveted buffer springs are added to absorb torque shock when locking is performed.
FIG. 1 illustrates a cross-sectional side view of a torque converter 10 according to an embodiment of the present invention. The torque converter 10 is rotatable about a central axis, and the torque converter 10 includes a front cover 12 for connection to a crankshaft of an internal combustion engine. The terms axially, radially, and circumferentially as used herein are used with respect to a central axis about which the torque converter rotates during operation. The transmission 10 also comprises, in a known manner: a turbine comprising a plurality of turbine blades; an impeller including a plurality of impeller blades; and a stator including a plurality of stator blades axially positioned between the turbine and the impeller. During operation, the impeller is rotated via the internal combustion engine, thereby causing the impeller blade clutch plates to generate a fluid flow that drives the turbine blade clutch plates. Fluid is redirected from the turbine back to the impeller by the stator vane clutch plates.
The torque converter 10 also includes a damper assembly that connects the turbine to a lock-up clutch 14 of the clutch assembly. More specifically, the damper assembly is connected to the radially outer radial portion 16 of the first clutch plate 18 of the clutch pack 20 of the lockup clutch 14. In this embodiment, the clutch pack 20 comprises, in addition to the clutch plate 18, two additional clutch plates 22, 24; however, in other embodiments, the number of clutch plates in a clutch pack may be different than three. The clutch plate 18 includes a radially outer portion 18c connected to the damper assembly and a radially inner portion 18d for clutch engagement. Between the radially outer portion 18c and the radially inner portion 18d, the clutch plate 18 includes an intermediate portion 18e that supports an axially extending rim 24c of the clutch plate 24. More specifically, the intermediate portion 18e includes circumferentially spaced slots 18f extending axially through the intermediate portion 18e, wherein each of the slots 18f receives one of the plurality of circumferentially spaced projections 24d of the rim 24c extending axially through the slot 18 f. Radially inward of the rim 24c, the clutch plate 24 includes a radially inner portion 24e for clutch engagement.
The lockup clutch 14 also includes a piston 26 for engaging the clutch pack 20 by forcing the clutch pack 20 against an inner surface 28 of the front cover 12. More specifically, the piston 26 contacts the first clutch plate 18 and forces the clutch plate 18 to press the clutch plates 22, 24 toward the engine such that the clutch plate 24 contacts the inner surface 28. The clutch plates 18, 24 each include a metal base plate 18a, 24a and friction material 18b, 24b on radially extending and axially opposing surfaces of the base plates 18a, 24a, respectively. In other arrangements, the clutch plate 22, piston 26, and/or inner surface 28 may include friction material in place of one or more of the friction materials 18b, 24b. During engagement, the piston 26 contacts the friction material 18b of the plate 18, and the friction material 24b of the plate 24 presses against the inner surface 28 of the front cover 12.
The piston 26 is axially slidable along a hub portion 30, the hub portion 30 being non-rotatably fixed to the front cover 12. The hub portion 30 is provided with a sealing ring 32 in a groove at its outer circumferential surface. The inner circumferential surface of the inner axially extending annular portion 34 of the piston 26 contacts the sealing ring 32 such that the piston 26 seals against the hub portion 30 at the innermost circumferential surface of the piston 26. The radially extending support plate 36 is fixed to the hub portion 30, for example, by welding. The support plate 36 projects radially outwardly from the hub portion 30, and the support plate 36 is provided with a sealing ring 38 at its outer circumferential surface, the sealing ring 38 being for contacting an inner circumferential surface of an outer axially extending annular portion 40 of the piston 26. The piston 26 also includes a radially extending annular portion 42, the annular portion 42 extending radially outward from the inner annular portion 34 to the outer annular portion 40. The piston 26 is resiliently connected to the bearing plate 36 by a plurality of circumferentially spaced resilient connection means, in this embodiment in the form of leaf springs 44, such that the piston 26 can be moved axially away from the bearing plate 26 to engage the lock-up clutch 14, but the piston 26 is preloaded away from the clutch pack 20 in the coast condition. Each leaf spring 44 is secured to the support plate 36 by a respective first fastener, in the form of a first rivet 46, passing through the support plate 36, and is secured to the piston 26 by a respective second fastener, in the form of a second rivet 48, passing through the annular portion 42 of the piston 26.
The clutch plate 22 is also resiliently connected to the front cover 12 by a plurality of circumferentially spaced resilient connections, in this embodiment in the form of leaf springs 50, such that the piston 26 is axially movable relative to the front cover 12 during clutch engagement and disengagement. Each leaf spring 50 is secured to the front cover 12 by a respective first fastener in the form of an extruded rivet 52 formed by the front cover 12, and is secured to the clutch plate 22 by a respective second fastener in the form of a rivet 54 passing through a radially inner portion 56 of the clutch plate 22. The radially outer portion 57 of the clutch plate 22 is axially positioned between the clutch plate 18 and the clutch plate 24. The plate spring 50 is fixed to a radially extending surface 56a of the radially inner portion 56 that faces the engine side.
The lockup clutch 14 further includes a damper in the form of a damper spring 58, the damper spring 58 being fixed to a radially extending surface 56b of the radially inner portion 56 of the clutch plate 22 on the transmission-facing side. The damper springs 58 are secured to the clutch plate 22 by rivets 54, each of the rivets 54 extending through a hole in one of the leaf springs 50 and through one of circumferentially spaced holes 60 in a base portion 62 of the damper spring 58. The base portion 62 extends radially and includes an engine-facing surface that rests flush against the radially extending surface 56b of the radially inner portion 56. The damper spring 58 also includes an axially and radially extending intermediate portion 64, the intermediate portion 64 projecting axially away from the clutch plate 22 toward the piston 26. At the end of the cushion spring 58 opposite the base portion 62, the cushion spring 58 includes a contact portion 66 for contacting the engine-side facing surface 26a of the piston 26. In this embodiment, the contact portion 66 extends radially inward from the intermediate portion 64. During clutch engagement, the piston 26 is forced against the contact portion 66 of the damper spring 58, forcing the damper spring 58 to elastically deform such that the intermediate portion 64 bends away from the piston 26 and the contact portion 66 is pressed toward the front cover 12. Further, the damper spring 58 absorbs torque shock of the piston 26 on the clutch pack 20, and controls engagement of the clutch pack 20 via the piston 26. More specifically, the damper spring 58 reduces the axial force applied by the piston 26 to the clutch plates 18 by applying an axial resistance force to the piston 26 during clutch engagement.
As shown in fig. 2a, in one embodiment, the base portion 62, the intermediate portion 64, and the contact portion 66 are each formed from a continuous loop. In another embodiment, as shown in fig. 2b, the base portion 62 is formed from a continuous ring, and the intermediate portion 64 and the contact portion 66 are formed from a plurality of circumferentially spaced fingers 68 projecting from the base portion 62. As shown in both fig. 2a, 2b, the base portion 62 includes a plurality of circumferentially spaced holes each for receiving one of the rivets 54.
In the foregoing specification, the invention has been described with reference to specific exemplary embodiments and examples thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention as set forth in the appended claims. The specification and drawings are, accordingly, to be regarded in an illustrative manner rather than a restrictive sense.

Claims (5)

1. A motor vehicle clutch assembly comprising:
a clutch pack including a first clutch plate;
an axially movable piston for engaging the clutch pack; and
a damper fixed to the first clutch plate, the damper configured to contact the piston and elastically deform to absorb a torque shock from the piston during engagement of the clutch pack by the piston, the damper being a damper spring including a base portion fixed to the first clutch plate and a contact portion for contacting an engine-side surface of the piston, and an axially and radially extending intermediate portion connecting the contact portion to the base portion, the intermediate portion being configured to bend away from the piston during engagement of the clutch pack via the piston, the contact portion having an unfixed free end when the clutch is not engaged.
2. A motor vehicle clutch assembly as set forth in claim 1 further including a front cover, said first clutch plate being resiliently connected to said front cover by at least one first resilient connection formed by a plurality of circumferentially spaced leaf springs.
3. A motor vehicle clutch assembly according to claim 2, wherein each of the leaf springs is connected to the first clutch plate by a respective fastener, which secures the damper to the first clutch plate.
4. A motor vehicle clutch assembly according to claim 1, wherein the first clutch plate includes a radially outer portion for engaging the other clutch plates of the clutch pack and a radially inner portion to which the damper is secured.
5. A method of forming a motor vehicle clutch assembly, comprising:
providing a clutch pack comprising a first clutch plate;
providing an axially movable piston for engaging the clutch pack; and
securing a damper to the first clutch plate, the damper configured to contact the piston and elastically deform to absorb a torque shock from the piston during engagement of the clutch pack by the piston, the damper being a damper spring including a base portion secured to the first clutch plate and a contact portion for contacting an engine side surface of the piston, and an axially and radially extending intermediate portion connecting the contact portion to the base portion, the intermediate portion configured to bend away from the piston during engagement of the clutch pack via the piston, the contact portion having an unsecured free end when the clutch is not engaged.
CN201780064981.8A 2016-10-26 2017-10-19 Motor vehicle clutch assembly including a damper to smooth clutch engagement Active CN109844373B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US15/334,629 2016-10-26
US15/334,629 US9915332B1 (en) 2016-10-26 2016-10-26 Motor vehicle clutch assembly including shock absorber for smoothing clutch engagement
PCT/US2017/057332 WO2018080883A1 (en) 2016-10-26 2017-10-19 Motor vehicle clutch assembly including shock absorber for smoothing clutch engagement

Publications (2)

Publication Number Publication Date
CN109844373A CN109844373A (en) 2019-06-04
CN109844373B true CN109844373B (en) 2023-04-11

Family

ID=61526348

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201780064981.8A Active CN109844373B (en) 2016-10-26 2017-10-19 Motor vehicle clutch assembly including a damper to smooth clutch engagement

Country Status (6)

Country Link
US (1) US9915332B1 (en)
JP (1) JP7014775B2 (en)
KR (1) KR102427594B1 (en)
CN (1) CN109844373B (en)
DE (1) DE112017005408T5 (en)
WO (1) WO2018080883A1 (en)

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US20230134624A1 (en) * 2021-11-01 2023-05-04 Schaeffler Technologies AG & Co. KG Torque converter with multi-plate clutch assembly

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JP6731265B2 (en) * 2016-03-18 2020-07-29 株式会社エクセディ Lockup device for torque converter

Also Published As

Publication number Publication date
WO2018080883A1 (en) 2018-05-03
KR20190062462A (en) 2019-06-05
JP2019533783A (en) 2019-11-21
KR102427594B1 (en) 2022-08-01
DE112017005408T5 (en) 2023-05-17
JP7014775B2 (en) 2022-02-01
US9915332B1 (en) 2018-03-13
CN109844373A (en) 2019-06-04

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